8 & 3/4 rear brake conversion to disc info

I need some help on buying a conversion brake system. I bought a Yukon bearing kit for the rear axle but Now I've decided to convert the rear brakes to disc. I see that they say you have to use green bearing. I need to know if the Yukon bearings will work. I don't know the difference.And the old bearings had a adjuster on one end do you still use that. I was looking at the wilwood or The summit brake conversion. Can I get some help here ? Thanks, Derek
This is a rear disc brake set-up i put on my 1980 Ply Volar'e station wagon. It's a 8.75 rear from a 1970 B-Body. The calipers, pads and rotor are from a 03-07 Liberty. The caliper bracket is from a 1995 Grand Cherokee. The bracket must be modified to work on all 8.75 rears. The brackets are all the same on the Liberty, Grand Cherokee and the Wrangler. Liberty rotors, calipers and pads are much beefier. Any rear disc brake set-up is way better than drums from the 60's an 70's... 50 plus yrs ago.58564.jpg